1. Material: Aluminum alloy 2. Application: road bike 3. Suitable for long-distance cruisers who can maintain a speed of 30+KM, and also suitable for explosive sprints of power players 4. CNC technology, better disc precision, smooth hand feeling while brushing 5. Large-area hollow design of the disc, lightweight design 6. The chain has a high degree of coordination with the tooth mouth of the disc, which is sensitive and fast 7. Waterproof and rustproof, good durability 8. With 4 pins, it is not easy to drop the chain 9. CBD: 130 mm 10. Weight: 39T about 44 grams, 53T about 109 grams
